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Your search keyword '"Urrestilla J."' showing total 5 results
Start Over Author "Urrestilla J." Topic astrophysics
5 results on '"Urrestilla J."'

1. Semilocal Cosmic String Networks

Author

Achucarro, A., Salmi, P., and Urrestilla, J.

Subjects
Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory
Abstract

We report on a large scale numerical study of networks of semilocal cosmic strings in flat space in the parameter regime in which they are perturbatively stable. We find a population of segments with an exponential length distribution and indications of a scaling network without significant loop formation. Very deep in the stability regime strings of superhorizon size grow rapidly and ``percolate'' through the box. We believe these should lead at late times to a population of infinite strings similar to topologically stable strings. However, the strings are very light; scalar gradients dominate the energy density and the network has thus a global texture-like signature. As a result, the observational constraints, at least from the temperature power spectrum of the CMB, on models predicting semilocal strings, should be closer to those on global textures or monopoles, rather than on topologically stable gauged cosmic strings., Comment: 5 pages, 3 figures; extended discussion about initial conditions; matches published version

Published
2005
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2. F-term strings in the Bogomol'nyi limit are also BPS states

Author

Achucarro, A. and Urrestilla, J.

Subjects
High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology
Abstract

We derive the Bogomol'nyi equations for supersymmetric Abelian F-term cosmic strings in four-dimensional flat space and show that, contrary to recent statements in the literature, they are BPS states in the Bogomol'nyi limit, but the partial breaking of supersymmetry is from N=2. The second supersymmetry is not obvious in the N=1 formalism, so we give it explicitly in components and in terms of a different set of N=1 chiral superfields. We also discuss the appearance of a second supersymmetry in D-term models, and the relation to N=2 F-term models. The analysis sheds light on an apparent paradox raised by the recent observation that D-term strings remain BPS when coupled to N=1 supergravity, whereas F-term strings break the supersymmetry completely, even in the Bogomol'nyi limit. Finally, we comment on their semilocal extensions and their relevance to cosmology., Comment: 11 pages; References added, minor corrections, matches published version

Published
2004
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3. D-term inflation without cosmic strings

Author

Urrestilla, J., Achucarro, A., and Davis, A. C.

Subjects
High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology
Abstract

We present a superstring-inspired version of D-term inflation which does not lead to cosmic string formation and appears to satisfy the current CMB constraints. It differs from minimal D-term inflation by a second pair of charged superfields which makes the strings non-topological (semilocal). The strings are also BPS, so the scenario is expected to survive supergravity corrections. The second pair of charged superfields arises naturally in several brane and conifold scenarios, but its effect on cosmic string formation had not been noticed so far., Comment: 10 pages, uses REVTEX 4; minor typos corrected, references added, version to be published

Published
2004
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4. Nielsen-Olesen strings in Supersymmetric models

Author

Pickles, M. and Urrestilla, J.

Subjects
High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology
Abstract

We investigate the behaviour of a model with two oppositely charged scalar fields. In the Bogomol'nyi limit this may be seen as the scalar sector of N=1 supersymmetric QED, and it has been shown that cosmic strings form. We examine numerically the model out of the Bogomol'nyi limit, and show that this remains the case. We then add supersymmetry-breaking mass terms to the supersymmetric model, and show that strings still survive. Finally we consider the extension to N=2 supersymmetry with supersymmetry-breaking mass terms, and show that this leads to the formation of stable cosmic strings, unlike in the unbroken case., Comment: 7 pages, 2 figues, uses revtex4; minor typos corrected; references added

Published
2002
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5. Exploring cosmic origins with CORE: Inflation

Author

F. Finelli, M. Bucher, A. Achúcarro, M. Ballardini, N. Bartolo, D. Baumann, S. Clesse, J. Errard, W. Handley, M. Hindmarsh, K. Kiiveri, M. Kunz, A. Lasenby, M. Liguori, D. Paoletti, C. Ringeval, J. Väliviita, B. van Tent, V. Vennin, P. Ade, R. Allison, F. Arroja, M. Ashdown, A.J. Banday, R. Banerji, J.G. Bartlett, S. Basak, P. de Bernardis, M. Bersanelli, A. Bonaldi, J. Borril, F.R. Bouchet, F. Boulanger, T. Brinckmann, C. Burigana, A. Buzzelli, Z.-Y. Cai, M. Calvo, C.S. Carvalho, G. Castellano, A. Challinor, J. Chluba, I. Colantoni, A. Coppolecchia, M. Crook, G. D'Alessandro, G. D'Amico, J. Delabrouille, V. Desjacques, G. De Zotti, J.M. Diego, E. Di Valentino, S. Feeney, J.R. Fergusson, R. Fernandez-Cobos, S. Ferraro, F. Forastieri, S. Galli, J. García-Bellido, G. de Gasperis, R.T. Génova-Santos, M. Gerbino, J. González-Nuevo, S. Grandis, J. Greenslade, S. Hagstotz, S. Hanany, D.K. Hazra, C. Hernández-Monteagudo, C. Hervias-Caimapo, M. Hills, E. Hivon, B. Hu, T. Kisner, T. Kitching, E.D. Kovetz, H. Kurki-Suonio, L. Lamagna, M. Lattanzi, J. Lesgourgues, A. Lewis, V. Lindholm, J. Lizarraga, M. López-Caniego, G. Luzzi, B. Maffei, N. Mandolesi, E. Martínez-González, C.J.A.P. Martins, S. Masi, D. McCarthy, S. Matarrese, A. Melchiorri, J.-B. Melin, D. Molinari, A. Monfardini, P. Natoli, M. Negrello, A. Notari, F. Oppizzi, A. Paiella, E. Pajer, G. Patanchon, S.P. Patil, M. Piat, G. Pisano, L. Polastri, G. Polenta, A. Pollo, V. Poulin, M. Quartin, A. Ravenni, M. Remazeilles, A. Renzi, D. Roest, M. Roman, J.A. Rubiño-Martin, L. Salvati, A.A. Starobinsky, A. Tartari, G. Tasinato, M. Tomasi, J. Torrado, N. Trappe, T. Trombetti, M. Tucci, C. Tucker, J. Urrestilla, R. van de Weygaert, P. Vielva, N. Vittorio, K. Young, M. Zannoni, ITA, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut Lagrange de Paris, Sorbonne Université (SU), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Nanosciences et Cryogénie (INAC), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département de Physique des Particules (ex SPP) (DPP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), CORE, Department of Physics, Helsinki Institute of Physics, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Sorbonne Universités, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Finelli, F, Bucher, M, Achúcarro, A, Ballardini, M, Bartolo, N, Baumann, D, Clesse, S, Errard, J, Handley, W, Hindmarsh, M, Kiiveri, K, Kunz, M, Lasenby, A, Liguori, M, Paoletti, D, Ringeval, C, Väliviita, J, Tent, B, Vennin, V, Ade, P, Allison, R, Arroja, F, Ashdown, M, Banday, A, Banerji, R, Bartlett, J, Basak, S, de Bernardis, P, Bersanelli, M, Bonaldi, A, Borril, J, Bouchet, F, Boulanger, F, Brinckmann, T, Burigana, C, Buzzelli, A, Cai, Z, Calvo, M, Carvalho, C, Castellano, G, Challinor, A, Chluba, J, Colantoni, I, Coppolecchia, A, Crook, M, D'Alessandro, G, D'Amico, G, Delabrouille, J, Desjacques, V, Zotti, G, Diego, J, Valentino, E, Feeney, S, Fergusson, J, Fernandez-Cobos, R, Ferraro, S, Forastieri, F, Galli, S, García-Bellido, J, de Gasperis, G, Génova-Santos, R, Gerbino, M, González-Nuevo, J, Grandis, S, Greenslade, J, Hagstotz, S, Hanany, S, Hazra, D, Hernández-Monteagudo, C, Hervias-Caimapo, C, Hills, M, Hivon, E, Hu, B, Kisner, T, Kitching, T, Kovetz, E, Kurki-Suonio, H, Lamagna, L, Lattanzi, M, Lesgourgues, J, Lewis, A, Lindholm, V, Lizarraga, J, López-Caniego, M, Luzzi, G, Maffei, B, Mandolesi, N, Martínez-González, E, Martins, C, Masi, S, Mccarthy, D, Matarrese, S, Melchiorri, A, Melin, J, Molinari, D, Monfardini, A, Natoli, P, Negrello, M, Notari, A, Oppizzi, F, Paiella, A, Pajer, E, Patanchon, G, Patil, S, Piat, M, Pisano, G, Polastri, L, Polenta, G, Pollo, A, Poulin, V, Quartin, M, Ravenni, A, Remazeilles, M, Renzi, A, Roest, D, Roman, M, Rubiño-Martin, J, Salvati, L, Starobinsky, A, Tartari, A, Tasinato, G, Tomasi, M, Torrado, J, Trappe, N, Trombetti, T, Tucci, M, Tucker, C, Urrestilla, J, de Weygaert, R, Vielva, P, Vittorio, N, Young, K, Zannoni, M, Finelli F., Bucher M., Achucarro A., Ballardini M., Bartolo N., Baumann D., Clesse S., Errard J., Handley W., Hindmarsh M., Kiiveri K., Kunz M., Lasenby A., Liguori M., Paoletti D., Ringeval C., Valiviita J., Tent B.V., Vennin V., Ade P., Allison R., Arroja F., Ashdown M., Banday A.J., Banerji R., Bartlett J.G., Basak S., De Bernardis P., Bersanelli M., Bonaldi A., Borril J., Bouchet F.R., Boulanger F., Brinckmann T., Burigana C., Buzzelli A., Cai Z.-Y., Calvo M., Carvalho C.S., Castellano G., Challinor A., Chluba J., Colantoni I., Coppolecchia A., Crook M., D'Alessandro G., D'Amico G., Delabrouille J., Desjacques V., Zotti G.D., Diego J.M., Valentino E.D., Feeney S., Fergusson J.R., Fernandez-Cobos R., Ferraro S., Forastieri F., Galli S., Garcia-Bellido J., De Gasperis G., Genova-Santos R.T., Gerbino M., Gonzalez-Nuevo J., Grandis S., Greenslade J., Hagstotz S., Hanany S., Hazra D.K., Hernandez-Monteagudo C., Hervias-Caimapo C., Hills M., Hivon E., Hu B., Kisner T., Kitching T., Kovetz E.D., Kurki-Suonio H., Lamagna L., Lattanzi M., Lesgourgues J., Lewis A., Lindholm V., Lizarraga J., Lopez-Caniego M., Luzzi G., Maffei B., Mandolesi N., Martinez-Gonzalez E., Martins C.J.A.P., Masi S., McCarthy D., Matarrese S., Melchiorri A., Melin J.-B., Molinari D., Monfardini A., Natoli P., Negrello M., Notari A., Oppizzi F., Paiella A., Pajer E., Patanchon G., Patil S.P., Piat M., Pisano G., Polastri L., Polenta G., Pollo A., Poulin V., Quartin M., Ravenni A., Remazeilles M., Renzi A., Roest D., Roman M., Rubino-Martin J.A., Salvati L., Starobinsky A.A., Tartari A., Tasinato G., Tomasi M., Torrado J., Trappe N., Trombetti T., Tucci M., Tucker C., Urrestilla J., De Weygaert R.V., Vielva P., Vittorio N., Young K., Zannoni M., String Theory (ITFA, IoP, FNWI), High-Energy Frontier, Astronomy, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Cryogénie (NEEL - Cryo), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Département de Physique des Particules (ex SPP) (DPhP), and Hélium : du fondamental aux applications (NEEL - HELFA)

Subjects
cosmological model, reheating, Cosmic microwave background, cosmic background radiation: polarization, SPECTRAL DISTORTIONS, astro-ph.CO, Astrophysics, cosmic background radiation, 7. Clean energy, 01 natural sciences, GRAVITATIONAL-WAVES, law.invention, law, 010303 astronomy & astrophysics, CMBR theory, ination, Astronomy and Astrophysics, CMBR theory, inflation, QC, QB, Physics, COSMIC cancer database, ST/J005673/1, ST/H008586/1, inflation: model, MICROWAVE BACKGROUND ANISOTROPY, Core inflation, Astrophysics - Cosmology and Nongalactic Astrophysics, Big Bang, scale: grand unified theory, Astrophysics and Astronomy, noise, Cosmology and Nongalactic Astrophysics (astro-ph.CO), STANDARD MODEL, satellite, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, isocurvature: perturbation, frequency: high, PRIMORDIAL NON-GAUSSIANITY, NO, Telescope, power spectrum: primordial, FIS/05 - ASTRONOMIA E ASTROFISICA, Settore FIS/05 - Astronomia e Astrofisica, LARGE-SCALE STRUCTURE, 0103 physical sciences, inflation, cosmic string, STFC, MODEL SELECTION, Inflation (cosmology), non-Gaussianity: primordial, ST/K00333X/1, ISOCURVATURE PERTURBATIONS, 010308 nuclear & particles physics, string tension, big bang, inflation: slow-roll approximation, RCUK, Spectral density, 115 Astronomy, Space science, cosmic background radiation: temperature, Cosmic string, detector: sensitivity, angular resolution, 13. Climate action, PRE-BIG-BANG, BAYESIAN-INFERENCE, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], cosmic background radiation: anisotropy
Abstract

We forecast the scientific capabilities to improve our understanding of cosmic inflation of CORE, a proposed CMB space satellite submitted in response to the ESA fifth call for a medium-size mission opportunity. The CORE satellite will map the CMB anisotropies in temperature and polarization in 19 frequency channels spanning the range 60-600 GHz. CORE will have an aggregate noise sensitivity of $1.7 ��$K$\cdot \,$arcmin and an angular resolution of 5' at 200 GHz. We explore the impact of telescope size and noise sensitivity on the inflation science return by making forecasts for several instrumental configurations. This study assumes that the lower and higher frequency channels suffice to remove foreground contaminations and complements other related studies of component separation and systematic effects, which will be reported in other papers of the series "Exploring Cosmic Origins with CORE." We forecast the capability to determine key inflationary parameters, to lower the detection limit for the tensor-to-scalar ratio down to the $10^{-3}$ level, to chart the landscape of single field slow-roll inflationary models, to constrain the epoch of reheating, thus connecting inflation to the standard radiation-matter dominated Big Bang era, to reconstruct the primordial power spectrum, to constrain the contribution from isocurvature perturbations to the $10^{-3}$ level, to improve constraints on the cosmic string tension to a level below the presumptive GUT scale, and to improve the current measurements of primordial non-Gaussianities down to the $f_{NL}^{\rm local} < 1$ level. For all the models explored, CORE alone will improve significantly on the present constraints on the physics of inflation. Its capabilities will be further enhanced by combining with complementary future cosmological observations., Latex 107 pages, revised with updated author list and minor modifications

Published
2018
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